Was going to put these in the last blog post, but had a brain fart, and didn't.
So, without further ado, here are some English-language links to more info about Gian Maria Volonte.
We start out, predictably enough, with two IMDB links to Mr. Volonte's biography and filmography at, respectively, http://www.imdb.com/name/nm0002231/bio, and http://www.imdb.com/name/nm0002231/filmoyear, as well as his Wikipedia entry at http://en.wikipedia.org/wiki/Gian_Maria_Volont%C3%A9.
We then go to RAI's(the Italian state-run radio and tv network)Italica site, where a section devoted to him in its "Political Films" section can be found at http://www.italica.rai.it/eng/cinema/political/volonte.htm.
This has a brief biography and filmography, as well as a production still from Investigation Of A Citizen Above Suspicion, and a video of Gian-Carlo Gianinini's reminscences about Volonte(in Italian only, sorry)can be found in the Multimedia sub-section there.
Finally, we have two reviews of a pair of films in which he starred, the first being of a 1987 Spaghetti Western, A Bullet For The General, directed by Damaniano Damaniani, at http://www.eccentric-cinema.com/cult_movies2007/bullet_general.htm, and of the 1979 Francesco Rosi adaptation of Carlo Levi's novel, Christ Stopped At Eboli, already mentioned above, at http://pellicola.wordpress.com/2007/05/25/cristo-si-e-fermato-a-eboli-christ-stopped-at-eboli-1979/.
The review there doesn't mention Volonte's performance in it, but has been included to give you all something of an idea, along with the A Bullet For The General review, of the sorts of films in which Mr. Volonte starred.
Incidentally, there's a link to a sound sample of Pierro Piccioni's music for Christ Stopped At Eboli towards the end of the review, so check that out if you want.
Those are it for now. Hope you enjoy them, and that maybe you learn a little bit about one of the great actors of world cinema of the 1960's, '70's and '80's.
Be seeing you.